Employing (5)
'employing' is the definition.
(to employ is to use)
This is all the clue.
(Other definitions for using that I've seen before include "taking drugs" , "addiction" , "Exploiting for one's own advantage" , "Exercising" , "Putting to a particular purpose" .)
'employing' is the definition.
('hire' can be a synonym of 'employ')
This is all the clue.
(Other definitions for hiring that I've seen before include "Rental" , "Engaging for work" , "Leasing" .)